Our customer required an electrical supply system that could operate at up to 6500A and continuously conduct current to an electrode with an operating stroke of 1m running into an arcing chamber operating at 500°C. A requirement for the electrodes was also their ability to be replaced in a relatively short amount of time. 

This initially onerous requirement rapidly expanded to a system of three chambers running simultaneously each with its own supply, further compounding the difficulty of the project. Each chamber required control of electrode operation, supply and current transfer over their operating strokes.